2011/6/3 Ying Han <yinghan@google.com>:> On Thu, Jun 2, 2011 at 6:27 AM, Hiroyuki Kamezawa> <kamezawa.hiroyuki@gmail.com> wrote:>> 2011/6/1 Johannes Weiner <hannes@cmpxchg.org>:>>> Once the per-memcg lru lists are exclusive, the unevictable page>>> rescue scanner can no longer work on the global zone lru lists.>>>>>> This converts it to go through all memcgs and scan their respective>>> unevictable lists instead.>>>>>> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>>>>> Hm, isn't it better to have only one GLOBAL LRU for unevictable pages ?>> memcg only needs counter for unevictable pages and LRU is not necessary>> to be per memcg because we don't reclaim it...>> Hmm. Are we suggesting to keep one un-evictable LRU list for all> memcgs? So we will have> exclusive lru only for file and anon. If so, we are not done to make> all the lru list being exclusive> which is critical later to improve the zone->lru_lock contention> across the memcgs>considering lrulock, yes, maybe you're right.